Which icon is best?

http://image.shutterstock.com/display_pic_with_logo/344665/344665,1326490052,1/stock-vector-vector-set-of-best-choice-icons-92665504.jpg

http://image.shutterstock.com/display_pic_with_logo/344665/344665,1326490052,1/stock-vector-vector-set-of-best-choice-icons-92665504.jpg

http://image.shutterstock.com/display_pic_with_logo/344665/344665,1326490052,1/stock-vector-vector-set-of-best-choice-icons-92665504.jpg

http://image.shutterstock.com/display_pic_with_logo/344665/344665,1326490052,1/stock-vector-vector-set-of-best-choice-icons-92665504.jpg